# Mentor Blogs

## Posts tagged with 'thermal comfort'

18 Dec, 2013
Mechanical Analysis

## Heat Your Home Office for 8p a Day. Part 4 - Comfort Temperature

Posted by Robin Bornoff

Have you ever wondered why, after a winter night, some of your car windows are iced over whilst others are not? Happens after a clear night with no clouds. To understand the reason one must appreciate the fact that something loses heat, and thus gets cold, for two reasons; losing heat to the local air by convection and losing heat to any colder surrounding object due to thermal radiation. On a cold … Read More

9 Dec, 2013
Mechanical Analysis

## Heat Your Home Office for 8p a Day. Part 3a - Was Dave Right?

Posted by Robin Bornoff

It’s always nice to get some comments on your blog. When starting writing blogs about 4 years ago I was told that so long as you write about something that you’re interested in, then others will read it. Comments are the echo to what otherwise would be a Demosthenes type shouting at a roaring sea of disinterest. So when a colleague here at Mentor, Dave Roberts, commented on Part 3 of this … Read More

27 Nov, 2013
Mechanical Analysis

## Heat Your Home Office for 8p a Day. Part 3 - It Takes Time

Posted by Robin Bornoff

Dylan in his original YouTube video made the point that the tea lights only burn for about 4 hours and that he replaces them after the morning burn for an afternoon warm up session. At 1p per candle, 1p/~35W, we shouldn’t lose sight of how cost effective this heating method is. There is some doubt as to the actual power dissipation for each candle but this approach is scalable, if a 4 candle arrangement … Read More

9 Aug, 2012
Mechanical Analysis

## Where’s the Best Place to Put a Radiator in a Room? Part 4: Premature Simulation

Posted by Robin Bornoff

One thing the Mechanical Analysis Division is not guilty of is vendor hubris. Despite the passion we have about our CFD based simulation solutions we know our place, especially in terms of where best to apply our solutions throughout the design process. CFD is a very powerful tool to predict 3D heat air flow and heat transfer but it certainly isn’t the only approach. As is common in both electronics … Read More

31 Jul, 2012
Mechanical Analysis

## Where’s the Best Place to Put a Radiator in a Room? Part 3: 13% Better

Posted by Robin Bornoff

Conventional wisdom has it that the best place to put a radiator in a room is under the window. However, there’s nothing conventional about wisdom and one should be obliged to question and verify those facts that we take for granted. CFD and its ability to predict air flow and heat transfer offers an unrivalled efficient method to study such applications. Using the concept of PPD (percentage people … Read More

26 Jul, 2012
Mechanical Analysis

## Where’s the Best Place to Put a Radiator in a Room? Part 2: PMV and other TLAs

Posted by Robin Bornoff

Sometime between 40 and 100 thousand years ago humans started to wear clothes, an estimate as accurate as you’d expect for something that wasn’t documented at the time. Earliest estimate of  humans documenting language are a mere 5000 years ago. One can only assume that it wasn’t modesty or fashion that drove the adoption of clothing, but comfort. Much of what we still do today, frequently … Read More

12 Jul, 2012
Mechanical Analysis

## Where's the Best Place to Put a Radiator in a Room. Part 1: Such Things are Important

Posted by Robin Bornoff

With the gulf stream having shifted south and now flowing happily somewhere high over Paris, the summer weather in the UK has been ‘unseasonably’ (literally) wet and miserable. People’s heating has been thermostatically popping back on all over the country which for July is unheard of. So with this as the background and in the context of a stagnating world economy, ever continuing … Read More

4 Apr, 2012
Mechanical Analysis

## Simulation Software So Simple Even Teenagers Can Use It

Posted by Robin Bornoff

The UK government has a policy for all year 10 or year 11 students to undertake a week’s work experience. Last week we welcomed a 15 year old student to the Mentor office where the FloTHERM and FloVENT software development is done. The student was tasked with simulating the air flow and temperature distribution in the office space using FloVENT. Using our own software to model our own offices … Read More